چگونه یک یو پی اس با توان و باتری مناسب انتخاب کنیم؟

Connection Failure
Warning: file_put_contents(/home/yfshop/public_html/news/wp-content/uploads/wpdm-cache/session-d3ec5c294686688ffa1b8b8c658017bf.txt): failed to open stream: No such file or directory in /home/yfshop/public_html/news/wp-content/plugins/download-manager/libs/class.Session.php on line 75